Molecular formula
C18H21NOS
82 compounds have this formula on CompoundList.
- Molar mass
- 299.43g/mol
- Monoisotopic mass
- 299.1344Da
- Atoms
- 42
- Elements
- 5
- Rings plus double bonds
- 9
The formula C18H21NOS describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom, 1 oxygen atom and 1 sulfur atom. It is written in Hill notation: carbon first, then hydrogen, then the other elements in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- C Carbon × 1872.20%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 217.07%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 14.68%14.007 × 1 = 14.007 g/mol
- O Oxygen × 15.34%15.999 × 1 = 15.999 g/mol
- S Sulfur × 110.71%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C18H21NOS
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 82 of 82 compounds
6,6-Dimethyl-3-(4-methylbenzoyl)-4,5,6,7-tetrahydro-1-benzothiophen-2-amine
CAS 1461715-47-8C18H21NOS
N-Butyl-2-phenyl-2-(phenylsulfanyl)acetamide
CAS 347321-28-2C18H21NOS
![2-[(4-Methylbenzyl)thio]-N-(2-phenylethyl)acetamide chemical structure, C18H21NOS, CAS 591732-33-1](/s/UULQZELYPOFXBS-UHFFFAOYSA-N.svg)
2-[(4-Methylbenzyl)thio]-N-(2-phenylethyl)acetamide
CAS 591732-33-1C18H21NOS
N-(4-Phenylbutan-2-yl)-2-phenylsulfanylacetamide
CAS 432499-54-2C18H21NOS
(E)-3-(4-Isobutylphenyl)-N-(2-thienylmethyl)-2-propenamide
CAS 329778-74-7C18H21NOS
6-Methyl-N-(2-phenylethyl)-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide
CAS 868153-86-0C18H21NOS
![3-[(Z)-(3-Ethyl-1,3-benzothiazol-2-ylidene)methyl]-5,5-dimethylcyclohex-2-en-1-one chemical structure, C18H21NOS, CAS 20105-06-0](/s/XEXFIPADMPTMPZ-YVLHZVERSA-N.svg)
3-[(Z)-(3-Ethyl-1,3-benzothiazol-2-ylidene)methyl]-5,5-dimethylcyclohex-2-en-1-one
CAS 20105-06-0C18H21NOS
2-Benzylsulfanyl-N-(2,3-dimethylphenyl)propanamide
CAS 445440-08-4C18H21NOS
N-(2-Ethylphenyl)-6-methyl-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide
CAS 824943-30-8C18H21NOS
2-Benzylsulfanyl-N-(2,5-dimethylphenyl)propanamide
CAS 333450-64-9C18H21NOS
(S)-2-((S)-Phenyl-o-tolylsulfanyl-methyl)-morpholine
CAS 668470-70-0C18H21NOS
![2-Methyl-N-{[1-(thiophen-2-yl)cyclopentyl]methyl}benzamide chemical structure, C18H21NOS, CAS 1058459-21-4](/s/WWTDWEUUUPHFDG-UHFFFAOYSA-N.svg)
2-Methyl-N-{[1-(thiophen-2-yl)cyclopentyl]methyl}benzamide
CAS 1058459-21-4C18H21NOS
N-(2-Ethylphenyl)-1-(thiophen-2-yl)cyclopentane-1-carboxamide
CAS 1049554-15-5C18H21NOS
N-(3,5-Dimethylphenyl)-3-(p-tolylthio)propanamide
CAS 895467-06-8C18H21NOS
N-(4-Methylbenzyl)-1-(thiophen-2-yl)cyclopentanecarboxamide
CAS 1049574-09-5C18H21NOS
N-(2,3-Dimethylphenyl)-1-(thiophen-2-yl)cyclopentanecarboxamide
CAS 1049554-69-9C18H21NOS
![Pyrrolidine, 1-[[4-[(4-methoxyphenyl)thio]phenyl]methyl]- chemical structure, C18H21NOS, CAS 677343-21-4](/s/AZPDJWMBHFXOQQ-UHFFFAOYSA-N.svg)
Pyrrolidine, 1-[[4-[(4-methoxyphenyl)thio]phenyl]methyl]-
CAS 677343-21-4C18H21NOS
![Ethanamine, 2-[(10,11-dihydrodibenz[b,f]oxepin-10-yl)thio]-N,N-dimethyl- chemical structure, C18H21NOS, CAS 72280-84-3](/s/KQAQPYPWZWQZDA-UHFFFAOYSA-N.svg)
Ethanamine, 2-[(10,11-dihydrodibenz[b,f]oxepin-10-yl)thio]-N,N-dimethyl-
CAS 72280-84-3C18H21NOS
N-tert-Butyl-2-phenyl-2-(phenylsulfanyl)acetamide
CAS 349415-69-6C18H21NOS
![N-(2-Methylbenzyl)-2-[(4-methylbenzyl)sulfanyl]acetamide chemical structure, C18H21NOS, CAS 428497-72-7](/s/PFOUWIQGJCVRKY-UHFFFAOYSA-N.svg)
N-(2-Methylbenzyl)-2-[(4-methylbenzyl)sulfanyl]acetamide
CAS 428497-72-7C18H21NOS
N-(2-Propan-2-ylphenyl)-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide
CAS 445023-65-4C18H21NOS
2-(Benzylsulfanyl)-N-(4-methylbenzyl)propanamide
CAS 367919-98-0C18H21NOS
N-Benzyl-N-methyl-1-(thiophen-2-yl)cyclopentane-1-carboxamide
CAS 1049573-93-4C18H21NOS
Ethylamine, 2-((10,11-dihydrodibenzo(b,f)thiepin-10-yl)oxy)-N,N-dimethyl-
CAS 1527-21-5C18H21NOS
- 4-(Diethylamino)-1-phenyl-1-(thiophen-2-yl)but-2-yn-1-ol1156-12-3C18H21NOS
- N-(2,6-Dimethylphenyl)-2-(4-methylphenyl)sulfanylpropanamide693269-51-1C18H21NOS
- N-(4-Ethylphenyl)-6-methyl-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide846591-02-4C18H21NOS
- N-(3,5-Dimethylphenyl)-6-methyl-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide844664-08-0C18H21NOS
- N-(2,3-Dimethylphenyl)-2-(propylsulfanyl)benzamide881788-58-5C18H21NOS
- N-(4-Butylphenyl)-2-(phenylsulfanyl)acetamide724735-05-1C18H21NOS
- N-[4-(Butan-2-yl)phenyl]-2-(phenylsulfanyl)acetamide432534-58-2C18H21NOS
- N-Cyclohexyl-5-methyl-4-phenylthiophene-3-carboxamide438220-01-0C18H21NOS
- 5-Propyl-N-(5,6,7,8-tetrahydronaphthalen-1-yl)thiophene-3-carboxamide587850-95-1C18H21NOS
- N-[1-(3,4-Dimethylphenyl)ethyl]-2-(phenylsulfanyl)acetamide894378-61-1C18H21NOS
- N-Cyclopropyl-N-(2-(thiophen-2-yl)ethyl)-2-(m-tolyl)acetamide1396714-54-7C18H21NOS
- N-{2-[1-(Phenylsulfanyl)butyl]phenyl}acetamide64872-85-1C18H21NOS
- 4-tert-Butyl-N-(3-methylsulfanylphenyl)benzamide530121-79-0C18H21NOS
- N-(3,5-Dimethylphenyl)-2-[(2-methylphenyl)methylsulfanyl]acetamide425415-45-8C18H21NOS
- 2-Benzylsulfanyl-N-(2-ethyl-6-methylphenyl)acetamide599159-78-1C18H21NOS
- 2-Benzylsulfanyl-N-(2-propan-2-ylphenyl)acetamide599159-43-0C18H21NOS
- N-[2-[(2-Methylphenyl)methylsulfanyl]ethyl]-2-phenylacetamide535976-25-1C18H21NOS
- N-(4-Butylphenyl)-2-methylsulfanylbenzamide831198-21-1C18H21NOS
- N-(2,6-Diethylphenyl)-2-methylsulfanylbenzamide833432-12-5C18H21NOS
- N-(4-Ethylphenyl)-2-[(4-methylphenyl)sulfanyl]propanamide664315-25-7C18H21NOS
- N-(2-tert-Butylphenyl)-2-methylsulfanylbenzamide879079-77-3C18H21NOS
- N-(2,6-Dimethylphenyl)-1-(thiophen-2-yl)cyclopentanecarboxamide1049514-60-4C18H21NOS
- N-Cyclopropyl-2,5-dimethyl-N-(2-(thiophen-2-yl)ethyl)benzamide1396793-46-6C18H21NOS
- 1-(4-(Thiophen-2-yl)piperidin-1-yl)-2-(m-tolyl)ethanone1396761-34-4C18H21NOS
- 1-(4-(Thiophen-3-yl)piperidin-1-yl)-2-(m-tolyl)ethanone1421510-12-4C18H21NOS
- 2-Cyclopentyl-N-(2-(thiophen-3-yl)benzyl)acetamide1706378-24-6C18H21NOS
- N-(2-Methylbenzyl)-3-[(4-methylphenyl)sulfanyl]propanamide723738-54-3C18H21NOS
- N-(2-Ethylphenyl)-3-[(4-methylphenyl)sulfanyl]propanamide664319-00-0C18H21NOS
- N-(2,3-Dimethylphenyl)-2-{[(2-methylphenyl)methyl]sulfanyl}acetamide535940-29-5C18H21NOS
- N-(1-Methyl-3-phenylpropyl)-2-(methylthio)benzamide884987-19-3C18H21NOS
- 2-(4-Methylphenyl)-N-{2-[(4-methylphenyl)sulfanyl]ethyl}acetamide477886-00-3C18H21NOS
- N-(3-Phenylpropyl)-4,5,6,7-tetrahydro-1-benzothiophene-2-carboxamide850168-31-9C18H21NOS
- 4-(tert-Butyl)-N-(4-(methylthio)phenyl)benzamide129488-47-7C18H21NOS
- 1-Phenyl-N-[2-(2-thienyl)ethyl]cyclopentanecarboxamide1334496-91-1C18H21NOS
- N-Phenethyl-1-(thiophen-2-yl)cyclopentanecarboxamide1049526-18-2C18H21NOS
- N-(2,4-Dimethylphenyl)-1-(thiophen-2-yl)cyclopentanecarboxamide1049526-61-5C18H21NOS
- N-(2,5-Dimethylphenyl)-1-(thiophen-2-yl)cyclopentane-1-carboxamide1049526-66-0C18H21NOS
- 3-Phenyl-1-(4-(thiophen-3-yl)piperidin-1-yl)propan-1-one1396716-93-0C18H21NOS
- 3-Phenyl-N-[1-(thiophen-2-yl)cyclopentyl]propanamide2034536-95-1C18H21NOS
- 1-(3-Phenylazepan-1-yl)-2-(thiophen-3-yl)ethanone2034472-66-5C18H21NOS
- ((1R,5S)-3-Cyclopropylidene-8-azabicyclo[3.2.1]octan-8-yl)(4-(methylthio)phenyl)methanone2176069-31-9C18H21NOS
- N-(2,4-Dimethylphenyl)-3-(4-methylphenyl)sulfanylpropanamide693797-29-4C18H21NOS
- N-(3,4-Dimethylphenyl)-3-(4-methylphenyl)sulfanylpropanamide693809-17-5C18H21NOS
- N-(1-Methylethyl)-4-[[(4-methylphenyl)thio]methyl]benzamide831231-34-6C18H21NOS
- 2,3,4,5-Tetrahydro-8-methoxy-1-[3-(methylthio)phenyl]-1H-3-benzazepine113520-99-3C18H21NOS
- N-Cyclopropyl-2-phenyl-N-(thiophen-3-ylmethyl)butanamide1324548-12-0C18H21NOS
- N-Benzyl-N-methyl-2-[(4-methylphenyl)sulfanyl]propanamide766533-81-7C18H21NOS
- N-(1-(Benzo[b]thiophen-3-yl)propan-2-yl)cyclohex-3-enecarboxamide2034470-25-0C18H21NOS
- Benzenecarbothioamide, N-(4-butylphenyl)-4-methoxy-62516-87-4C18H21NOS
- N-Methyl-N-(5-phenylthiophen-2-yl)cyclohexanecarboxamide62188-03-8C18H21NOS
- 2-[4-(2-Phenylpropan-2-yl)phenoxy]propanethioamide88384-14-9C18H21NOS
- 3-[4-(2-Phenylethyl)thiomorpholin-2-yl]phenol112393-78-9C18H21NOS
- 4-Butoxy-N-(4-methylphenyl)benzene-1-carbothioamide62516-88-5C18H21NOS
- 3-Butyl-5-methyl-2-(naphthalen-1-yl)-1,3-thiazolidin-4-one823192-01-4C18H21NOS
- 9-[3-(Dimethylamino)propyl]-9H-thioxanthen-9-ol4295-66-3C18H21NOS
- (6-Cyclohexylsulfanyl-pyridin-3-yl)-phenyl-methanol1355179-53-1C18H21NOS
- 4-[3-(Dimethylamino)propyl]-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-ol4507-21-5C18H21NOS
- N-(4-(Benzyloxy)phenethyl)thietan-3-amine1994061-63-0C18H21NOS
Frequently asked questions
What is the molar mass of C18H21NOS?
The molar mass of C18H21NOS is 299.43 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom, 1 oxygen atom and 1 sulfur atom. The monoisotopic mass is 299.1344 Da.
How many compounds have the formula C18H21NOS?
CompoundList lists 82 compounds with the molecular formula C18H21NOS, including 6,6-Dimethyl-3-(4-methylbenzoyl)-4,5,6,7-tetrahydro-1-benzothiophen-2-amine, N-Butyl-2-phenyl-2-(phenylsulfanyl)acetamide, 2-[(4-Methylbenzyl)thio]-N-(2-phenylethyl)acetamide. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.
What is the degree of unsaturation of C18H21NOS?
C18H21NOS has a degree of unsaturation of 9. That is the total number of rings and pi bonds (a double bond counts as one, a triple bond as two) in any structure with this formula.